Understanding GBIF taxonomic keys - usageKey, taxonKey, speciesKey

[therobyouknow]

Thank you, this helps but one thing not mentioned above is taxonID - I have a further question, asked here:

What is {int} in the species API? is it: taxonID or taxonKey (and are they the same thing?)

On page developer/species url on gbif dot org, {int} is referred to in several API endpoint calls, e.g. /species/{int} I believe {int} is taxonID, would I be correct? Also, another question, is taxonID the same thing as taxonKey ? (are the synonyms?) I believe {int} is the taxonID because I downloaded hosted-backbone-current.zip from datasets dot gbif dot org slash datasets slash backbone slash hosted-backbone-current.zip and in the enclosed file, Taxon.csv, if I look at the taxonID and then…